CN101333073A - Arsenic-free and leadless lanthanum crown optical glass NLaK40 and method for manufacturing same - Google Patents
Arsenic-free and leadless lanthanum crown optical glass NLaK40 and method for manufacturing same Download PDFInfo
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- CN101333073A CN101333073A CNA2007100432683A CN200710043268A CN101333073A CN 101333073 A CN101333073 A CN 101333073A CN A2007100432683 A CNA2007100432683 A CN A2007100432683A CN 200710043268 A CN200710043268 A CN 200710043268A CN 101333073 A CN101333073 A CN 101333073A
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Abstract
The invention discloses an arsenic-free and lead-free lanthanide optical glass NLaK40 and a manufacturing method, wherein, based on weight percentage, the glass comprises 25-30 percent of SiO2, 13-18 percent of B2O3, 13-20 percent of La2O3, 0-0.5 percent of Gd2O3, 1-3 percent of TiO2, 0.5-1.5 percent of ZrO2, 0.5-1.5 percent of CaO, 30-35 percent of BaO, 0-0.2 percent of Nb2O5, 0.5-2.0 percent of K2O, 0-0.5 percent of WO3, and 0.5-1.5 percent of Na2O. The invention uses TiO2, a small amount of Nb2O5, Gd2O3 and WO3 to replace PbO; meanwhile, the invention adds a small amount of CaO, Na2O, K2O and ZrO2 into the glass to adjust the melting performance and the required optical constant requirements; the invention also adds clarifying agent to the glass. The invention meets the required optical performance requirements and has good melting and operating performances, which can produce quality products at a low cost.
Description
Technical field
The present invention relates to a kind of no arsenic, unleaded lanthanum crown optical glass and manufacture method thereof.
Background technology
Present lanthanum crown optical glass, owing to contain plumbous oxide and arsenic oxide arsenoxide, environment is polluted, only adopt one or more compositions to replace plumbous oxide can not reach the effect that plumbous oxide played usually in glass system and form the glass that required optical property requires.
Summary of the invention
The object of the present invention is to provide a kind of optical constant (n
d, v
d), bubble, the requirement of striped conformance with standard, crystallization property, good no arsenic, the unleaded lanthanum crown optical glass of processability.
The present invention is at SiO
2, B
2O
3, La
2O
3, on the BaO basic system, use TiO
2, minor N b
2O
5, Gd
2O
3, WO
3Replace PbO, and add a spot of CaO, Na
2O, K
2O, ZrO
2Adjust melting properties and desired optical constant requirement, and add finings.Reached the required optical property requirement of leadless lanthanum crown optical glass NLaK 40.Have good fusing and processing property and can produce the fine product at an easy rate.
The present invention is with the weight percent meter based on oxide compound, and this glass has following composition:
SiO
2?25～30?B
2O
3?13～18?La
2O
3?13～20?Gd
2O
3?0～0.5?TiO
21～3?ZrO
2?0.5～1.5?CaO?0.5～1.5?BaO?30～35?Nb
2O
5?0～0.2K
2O?0.5～2.0?WO
3?0～0.5?Na
2O?0.5～1.5。
The refractive index n of this glass
dBe 1.6600～1.6700, Abb v
dBe 50.8～52.3,
This glass oxygen-freeization is plumbous and also do not contain arsenic oxide arsenoxide.
This glass contains 1.9%～3.0% TiO
2With 0～1.5% ZrO
2, under these content, this two composition has not only improved the chemical stability of glass, and helps adjustment to reach required n
dAnd v
dRequirement.
This glass contains 0～1% CaO, 0.5～1.5%K
2O, 0.5～1.5%Na
2O has effectively improved the melting properties of glass, even containing 25～30%SiO
2Situation under also can found out high-quality homogeneous glass preferably, and this content is unlikely to reduce the chemical stability of glass.
In order to improve the quality of glass, can in admixtion, add conventional finings, with fining glass, also can be by adjusting the ratio of carbonate and nitrate, equally also can reach clarifying effect, so this glass has good especially inner glass quality, do not have bubble and striped.
This glass does not contain PbO and does not preferentially contain As in the embodiment yet
2O
3, with traditional glassy phase ratio that contains PbO and have identical optical grade, the manipulable temperature range of this glass is bigger.
Embodiment
Below table 1 be 6 examples making glass with conventional opticglass raw material
Table 1
Glass is formed the optical property of (by weight percentage, based on oxide compound) and this glass
1 2 3 4 5 6
SiO
2 30 28.0 28.1 28.3 27.0 26.0
B
2O
3 13.5 15.0 14.5 16.4 14.1 18.0
La
2O
3 13.0 17.2 18.4 18.3 20 18.7
Gd
2O
3 0.3 0.3 0.3 0.2 0.5 0.3
TiO
2 2.9 2.4 1.2 2.3 2.5 2.3
ZrO
2 1.4 0.9 0.9 0.9 0.5 0.8
CaO 1.4 0.8 0.8 0.7 0.8 0.5
BaO 35 32.4 33 30 31.8 30.5
Nb
2O
5 0.2
K
2O 0.5 1.3 1.3 1.2 1.4 1.3
WO
3 0.3 0.3 0.1 0.4 0.5 0.4
Na
2O 1.5 1.4 1.4 1.3 0.9 1.2
n
d 1.6612 1.6643 1.6624 1.6701 1.6699 1.6697
v
d 51.46 51.38 52.24 50.96 51.37 51.40
These above-mentioned glass are produced as follows: add in the 2L platinum crucible behind each the component uniform mixing with above-mentioned requirements in batches, in the melting of silicon molybdenum rod furnace internal heating, glass melting temperature: 1350 ℃～1380 ℃, teeming temperature: 1150 ℃～1180 ℃, pour in the pig mold of preheating, the demoulding is put into retort furnace and is annealed annealing temperature after the moulding: 610 ℃～640 ℃, promptly obtain product of the present invention after the annealing.This product can be produced in batches at 58L at present.
Claims (4)
1. do not have arsenic, leadless lanthanum crown optical glass NLaK 40, it is characterized in that: with the weight percent meter based on oxide compound, this glass has following composition:
SiO
2 25～30
B
2O
3 13～18
La
2O
3 13～20
Gd
2O
3 0～0.5
TiO
2 1～3
ZrO
2 0.5～1.5
CaO 0.5～1.5
BaO 30～35
Nb
2O
5 0～0.2
K
2O 0.5～2.0
WO
3 0～0.5
Na
2O 0.5～1.5
2. no arsenic according to claim 1, leadless lanthanum crown optical glass NLaK 40 is characterized in that:
SiO
2 27～30
B
2O
3 13～15
La
2O
3 17～20
Gd
2O
3 0～0.5
TiO
2 1～3
ZrO
2 0.5～1.5
CaO 0.5～1.5
BaO 30～35
K
2O 0.5～2.0
WO
3 0～0.5
Na
2O 0.5～1.5
3. no arsenic according to claim 1 and 2, leadless lanthanum crown optical glass NLaK 40 is characterized in that this glass contains Sb
2O
30～0.2%.
4. the production technique for preparing claim 1 or 2 described lanthanum crown optical glass, it is characterized in that: add in the 2L platinum crucible behind each the component uniform mixing with above-mentioned requirements in batches, in the melting of silicon molybdenum rod furnace internal heating, glass melting temperature: 1380 ℃, found in the process and stir, be incubated 4～5 hours, reduce to then in 1180 ℃ of pig molds that pour into preheating, the demoulding is put into retort furnace and is annealed after the moulding, promptly obtains product after the annealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100432683A CN101333073A (en) | 2007-06-29 | 2007-06-29 | Arsenic-free and leadless lanthanum crown optical glass NLaK40 and method for manufacturing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100432683A CN101333073A (en) | 2007-06-29 | 2007-06-29 | Arsenic-free and leadless lanthanum crown optical glass NLaK40 and method for manufacturing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101333073A true CN101333073A (en) | 2008-12-31 |
Family
ID=40195995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100432683A Pending CN101333073A (en) | 2007-06-29 | 2007-06-29 | Arsenic-free and leadless lanthanum crown optical glass NLaK40 and method for manufacturing same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101333073A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771705A (en) * | 2012-10-18 | 2014-05-07 | 成都光明光电股份有限公司 | Environmentally-friendly optical glass |
| CN107759074A (en) * | 2017-11-07 | 2018-03-06 | 柳州市奥康眼镜有限公司 | A kind of high refraction lanthanum crown optical glass and optical element |
| CN110234612A (en) * | 2017-02-01 | 2019-09-13 | 株式会社小原 | Optical glass, prefabricated component and optical element |
-
2007
- 2007-06-29 CN CNA2007100432683A patent/CN101333073A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771705A (en) * | 2012-10-18 | 2014-05-07 | 成都光明光电股份有限公司 | Environmentally-friendly optical glass |
| CN110234612A (en) * | 2017-02-01 | 2019-09-13 | 株式会社小原 | Optical glass, prefabricated component and optical element |
| CN107759074A (en) * | 2017-11-07 | 2018-03-06 | 柳州市奥康眼镜有限公司 | A kind of high refraction lanthanum crown optical glass and optical element |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081231 |